There is a fix kit for that. Click

As far as a complete regulator from a vendor. All the same. Should last a long time. A good donor is good. Lots of choices. All good. Don't fret. Rollers probably should be changed from same vendor. Click

Generally speaking, there is not enough volume, for our parts, for more than one Chinese manufacturer.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn